Is case hardening carburizing?

Carburizing is a case hardening process in which carbon diffuses into the surface layer of a steel part at a temperature high enough to change the steel grain structure. The result is a wear-resistant layer that makes the carburizing an ideal process in the production of strong, safe metals. …

What are the two basic methods of case hardening steel?

To achieve these different properties, two general processes are used: 1) The chemical composition of the surface is altered, prior to or after quenching and tempering; the processes used include carburizing, nitriding, cyaniding, and carbonitriding; and 2) Only the surface layer is hardened by the heating and …

What is case carburizing explain?

Carburizing, also referred to as Case Hardening, is a heat treatment process that produces a surface which is resistant to wear, while maintaining toughness and strength of the core. This treatment is applied to low carbon steel parts after machining, as well as high alloy steel bearings, gears, and other components.

What are different types of case hardening process?


  • Flame or induction hardening.
  • Carburizing.
  • Nitriding.
  • Cyaniding.
  • Carbonitriding.
  • Ferritic nitrocarburizing.

Which is a case hardening process?

The case hardening process adds a thin layer of metal alloy to the outer surface of the metal. This process can minimize wear and tear and increase the strength of the steel parts’ surface.

What is the case hardening process?

Case-hardening or surface hardening is the process of hardening the surface of a metal object while allowing the metal deeper underneath to remain soft, thus forming a thin layer of harder metal at the surface.

Why carburizing is done?

Corrosionpedia Explains Carburizing The purpose of this process is to make the metal harder and manageable. The hardness of steel with low carbon content can be enhanced through the addition of carbon under a certain form of heat treatment. When successfully performed, it can improve the surface hardness of the steel.

How does carburizing increase the surface hardness of steel?

In carburizing, the surface hardness of the steel is increased by adding carbon to the component. The component that requires hardening is heated to 9000C and exposed to a carbon environment. The carbon penetrates the surface of the metal and strengthens it.

How does case hardening affect the quality of steel?

Case, or surface, hardening increases the surface strength of metal without impacting the inner core of the part. This is accomplished by adding another layer of metal to the surface, which helps decomposition due to repetitive stress. Case hardening steel grades depend on the temperature used during the treatment process.

What’s the best way to harden carbon steel?

Harden carbon steel parts in batches, creating wear-resistant surfaces. Place parts in a vented steel container, pack compound around parts, seal container tightly, and heat to 1750° F. For controlled cooling, use quenching oil instead of water to minimize cracking and distortion after heat treating parts and tools.

What happens to barium carbonate during case hardening?

Barium carbonate decomposes around the correct temperature for case hardening, releasing carbon dioxide. The carbon dioxide reacts with the charcoal, giving carbon monoxide which carburizes the metal, the resulting carbon dioxide then reacts with more charcoal and the process repeats. If it is not closed in, the carbon dioxide…